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How do I fix common Microsoft Office installation error codes?

Published on December 31st, 2021 Updated: April 11th, 2022

One of the most common Microsoft Office installation error codes is 0x80070643. This error code can occur for a number of reasons, including when there is a corrupt or damaged file in the Office installation, or when there is a problem with the Windows registry. In some cases, this error code can also occur if the computer is not able to connect to the Microsoft Office servers.

1. Restart your computer and try installing Office again

To restart your computer and try installing Office again: -Press the "Windows" key and "R" keys at the same time. -Type "msconfig" and press Enter. -Select the "Startup" tab. -Under "Restart options", select "Shut down and restart". -Select "Yes" to restart your computer. -Install Microsoft Office again.

2. Make sure you have the latest updates for Windows

  1. In the left-hand pane, click Check for updates.
  2. In the results pane, click View all updates.
  3. In the Select updates to install section, click the Update tab.
  4. In the Select updates to install section, click the Microsoft Office updates check box.
  5. In the Details section, under Office updates, click Download updates.
  6. In the Download updates window, under Office updates, click Install updates.
  7. In the Install updates window, under Office updates, click Install updates.
  8. In the Install updates window, under Office updates, click Install updates.
  9. In the Install updates window, under Office updates, click Install updates.
  10. In the Install updates window, under Office updates, click Install updates.
  11. In the Install updates window, under Office updates, click Install updates.
  12. In the Updates completed window, under Office updates, click Close.

3. Temporarily disable any antivirus software and firewall protection you have running on your computer

  1. Open your computer's Start Menu and type "msconfig"
  2. In the "msconfig" window, click on the "Security" tab.
  3. In the "Security" tab, under "Windows Firewall," click on the "Disable" button.
  4. Under "Windows Firewall Enabled Components," uncheck the "Microsoft Office Installation Service" checkbox.
  5. Click on the "Apply" button to save your changes.

Still not working? maybe try one of these options:

  1. Try installing Office using the offline installer.
  2. Clear the Office Software Protection Platform cache.
  3. Repair your Office installation.
  4. Uninstall and reinstall Office.
  5. Activate Office over the phone.